![]() ![]() If the cable length is significant, then it might be worth your while to have the discussion in advance with the inspector. I suppose the bottom line is the value of your time to do the load calculation and discuss this with an inspector versus the amount you save in wire costs. To safely use a 200 amp electrical service, you will need to use 4/0 Aluminum, Aluminum Clad Wire, or 2/0 Copper. This provides plenty of capacity for future circuits and avoids wasting your time arguing. When installing a 200 Amp service, you will need at least 3/0 AWG copper wire or 4/0 AWG aluminum or aluminum copper-clad wire. Suitable only for feeding 240 Vac and 208 Vac two-wire loads. 3560 A circuit breakers are suitable for use with 75 o C conductors. 1030 A circuit breakers are suitable for use with 60 o C or 75 o C conductors. A more common size for a neutral in a residence is two sizes smaller than the phase conductors. Includes two circuit breakers (one QO2030 and one QO3020) and handle tie QOTHT. Then, you can now determine the AWG by referring to a CM to AWG conversion wire size chart. CM 2 × 100ft × 12.9 × 150amps 7.2V 53, 750 C M 2 × 100 ft × 12.9 × 150 amps 7.2 V 53, 750. If you want to be safe you can use 2x2AWG, thats about the same area as 2/0 AWG (which is the minimum recommended for 200A in marine installations, for example). 200 amp x 100 / 80 250 amps (to account for the 80 rule) Next, determine how long your wire run is. I do agree with you that the neutral can be sized to the maximum unbalanced load if it meets the other requirement for minmum size of ground.īe prepared to show your service calculation if you want to win that arguement with an inspector. For example, let’s consider you want to install a 150-amp service with a 240v power supply 100 feet away, using a copper wire. However, when one tries to do something that is out of the ordinary or unusual the typical reaction from other tradesmen or inspectors is at least surprise or disbelief. Then if you assume that all those loads are on one phase, which would never happen, a #4 copper would certainly be plenty large. If one does a load calculation for a typical residential service, even for a large house, the maximum 120-volt loads are very likely well below 100 amps. Suggesting the burning scrap wire to remove the insulation will result in a ban.I believe that you are correct. Do not post encouraging or mocking suicide, mental illness, or drug use.Ħ. No illegal, unethical, or disturbing subject matter. Example: Blogs, articles, news sites, YouTube channels, items for sale, ect.ĥ. But the wiring diagram shouldnt exceed the circuitrys 200-amp limit. By checking this table, you can see you will need either 4/0 AWG copper wire or 300 kcmil aluminum. No incorrect, unsafe, or hazardous informationīlatant incorrect information or hazardous advice will result with a ban Helps determine the proper wire size for an electrical circuit based on the. Choose the right 30-amp double-pole breaker and 10-gauge wire. For example, let’s say you are trying to figure out the feeder wire size for 300 amp service. Id be inclined to use conduit and pull THHN but you might want to go another route. ![]() amp circuit, its important to select the correct wire size. Adhere to the Reddiquette.ĭO NOT post any personal information of any kind. Siemens 200 Amp 2-Pole Non-fusible General-duty Safety Switch Disconnect. Civil disagreements can happen, but insults should not. No personal attacks on anyone at any timeīe polite and respectful in your exchanges. The Quick Answer Installing a 200 amp service requires a permit and professional experience. After a period of inactivity, this subreddit is under construction and will be available to the public shortly.
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